Piping for pressure fluids



Dec. 13, '1923.

11,47829 P. MARINONI PIPING FOR PRESSURE FLUIDS Filed May 5, 1921 Je?? "mosh Patented Dec. l, i923.,

.TTES

PXETRO MBINON, 01T MILAN', ITALY.

PIPING FOR PRESSURE FLUIDS.

Application led May 5, 1921.

To all whom t may concern:

Be it known that PIETRO MARINONI, a subject of the King of Italy, and residing at Milan, Italy, has invented certain new and useful lmprovements in Pipings for Pressure Fluids, of which the following is a specification.

The present invention has reference particularly to iiuid conduits and more particularly relates to improved pipe systems for conducting luidsunder pressure.

Heretofore in power plants in conducting water from the source of supply to the plant it has been customary to use heavy f steel or other metallic pipings resulting in a considerable expenditure from a construe tional standpoint. It is the primary aim and object of the present invention to reduce the cost in constructing pipings by employing in lieu of a heavy steel pipe a pipe constructed of thin metal or the like combined with a suitable reinforced cementitious conduit.

More particularly the present invention resides in the provision of a pipe system wherein a hole is first dug horizontally be neath the surface of the ground and partly filled with a cementitious or gravel like substance the latter contacting with the walls of the hole and in addition leaving a central conduit for the reception of the improved sheet metal pipe.

It is a more specific object to provide improved means for reinforcing the cementitions wall or external lining; to improve the construction of the sheet metal piping by the provision of means permitting` the same to expand upon the cracking of the cementitious external lining and to also provide improved metal strips and bands for covering the longitudinal and annular grooves in the piping which permits the expansion of the pipe. Among the other aims and objects of the invention may be recited the provision of an arrangement of the above character with a view to compactness and wherein the number of parts are few, the construction simple, the cost of production low and etliciency high.

Further objects, as well as the nature, characteristic features and scope of the invention will be more readily apparent taken in connection with the drawings and pointed out in the claims forming a part of this specification.

Serial No. 467,190.

same being lled with cementitious or gravel-like substance c which contacts with walls of the passageway and in which is formed a central conduit Z9 which is circular in cross-section. This conduit receives the light sheet metal pipe 0 desirably constructed and in telescopically engaged sections and provided throughout with intersecting annular and longitudinal external grooves l preferably formed as `by bending or crimping at the desired points.

When the pipe is inserted the grooves el are covered with strips and bands c lying respectively over the longitudinal and an` nular grooves as indicated in Fig. 2, said strips being extended throughout the length of the grooves for preventing cementitious or gravel-like substance a from entering these grooves so that in the event of a crack occurring in the substance a between the points fm, n in Fig. 2 the pipe c will expand or slide by reason of the increased diameter of ,the conduit when the crack occurs. This partial or whole flattening of the grooves al is effected by the pressure of the fluid beine conducted in thc pipe.

To further reinforce the piping system at the time of the laying of the cementitious or gravel-like body a suitable canals are provided in the present instance at the corners of the passageway as indicated in Fig. 1 and these are filled with liquid cement under pressure for the purpose of reinforcing the cementitious body and reducing the possibility of cracking of the same.

It is believed in view of the foregoing that the advantages of the invention will be readily apparent and that a further detailed description of the invention is entirely unnecessary.

Likewise it is believed that the advantages oit the piping system will be apparent. Having thus fully described the inven* tion what is claimed and desired-to lbe secured by Letters Patent is z-- A. pipingl arrangement of the character described including in combination, en outer piece of piping of eementitious material, en

inner piece o piping constructed ofliglit sheet metal and provided with vexternal Elongitudinal and annuler `grooves intersecting each other, and externa-l metallic pro-V tecting strips vfor .covering the grooves.

nw. 'PIETRO MARINONI. 

